private SystemCaching.CacheItemPolicy GetCacheDependency(object tag, CacheItemPolicy itemPolicy, ServiceCacheByDispatcher dispatch)
{
// item priority
SystemCaching.CacheItemPriority itemPriority;
switch (itemPolicy.Priority)
{
case CacheItemPriority.NotRemovable:
itemPriority = SystemCaching.CacheItemPriority.NotRemovable;
break;
default:
itemPriority = SystemCaching.CacheItemPriority.Default;
break;
}
var removedCallback = (itemPolicy.RemovedCallback != null ? new SystemCaching.CacheEntryRemovedCallback(x => { itemPolicy.RemovedCallback(x.CacheItem.Key, x.CacheItem.Value); }) : null);
var updateCallback = (itemPolicy.UpdateCallback != null ? new SystemCaching.CacheEntryUpdateCallback(x => { itemPolicy.UpdateCallback(x.UpdatedCacheItem.Key, x.UpdatedCacheItem.Value); }) : null);
var newItemPolicy = new SystemCaching.CacheItemPolicy
{
AbsoluteExpiration = itemPolicy.AbsoluteExpiration,
Priority = itemPriority,
RemovedCallback = removedCallback,
SlidingExpiration = itemPolicy.SlidingExpiration,
UpdateCallback = updateCallback,
};
var changeMonitors = GetCacheDependency(tag, itemPolicy.Dependency, dispatch);
if (changeMonitors != null)
{
var list = newItemPolicy.ChangeMonitors;
foreach (var changeMonitor in changeMonitors)
{
list.Add(changeMonitor);
}
}
return(newItemPolicy);
}
